I like Holley's but they do run rich just off idle/ cruise 20mph to 40mph. I think the vacuum street avengers or what ever holley called them are designed to be a little leaner at cruise.
Can`t stand the Avenger series carbs and recently took one off of a Rousch(sp) equipped Cobra replica w/500+ hp and the owner couldn`t be happier. Vacuum carbs suck and I never want a vac. signal controlling the enrichment on anything I build BUT, we`re not talkin jetting and p/v changes here the WHOLE carb needs to be calibrated from idle, transition, cruise and wide f#$%^n open. I drilled and tapped the idle and hi-speed bleeds and lowered the ifr`s and made it adjustable beyond "as delivered" from Holley........
